CN115812127A

CN115812127A - Barbell with quick fastening nut for tightening weight plate

Info

Publication number: CN115812127A
Application number: CN202280005352.9A
Authority: CN
Inventors: 莫里茨·格雷瑟; 马塞尔·瓦尔
Original assignee: Ma SaierWaer; Mo LiciGeleise
Current assignee: Ma SaierWaer; Mo LiciGeleise
Priority date: 2021-04-07
Filing date: 2022-03-17
Publication date: 2023-03-17
Also published as: TW202300198A; EP4320360A1; TWI815369B; DE102021108688B3; WO2022214294A1; US20230285793A1

Abstract

A barbell as a sports equipment is proposed, which has a rod for detachably and/or replaceably holding a weight piece and has at least one weight piece, wherein the rod has at least one external thread and has a fastening nut for simply and quickly replacing the weight piece. According to the invention, this is achieved by configuring the fastening nut as a quick fastening nut having a through-hole with an internal thread, wherein the through-hole is widened at the end of the through-hole such that the rod can be moved along the insertion axis into the through-hole with the external thread without engaging the internal thread, while the fastening nut is released relative to the rod and is in a release position, wherein the internal thread and the external thread can engage and thus enter the engagement position and/or be released from each other.

Description

Barbell with quick fastening nut for tightening weight plate

Technical Field

The invention relates to a barbell as a sports apparatus for training and/or playing a game, having a bar for detachably and/or replaceably holding weight plates and having at least one weight plate and having a fastening nut for holding and/or fixing the respective weight plate to be held on the bar by tightening the fastening nut relative to the weight plate, according to the preamble of claim 1.

Background

Barbells with exchangeable weight plates for training or playing games are usually composed of a barbell bar, two nuts and weight plates in the form of various weight plates. The barbell bar has a handle in the middle portion and an external thread in the two outer portions. Between the handle and the external thread there is a ring, respectively, which acts as a stop for the weight plate. The weight plates, which can be obtained at different weights, have a central bore and can be pushed onto the external thread of the barbell bar until the respective stop. To secure the weight plate, nuts are threaded onto the external threads on both sides of the barbell bar, respectively. Such a barbell is known from DE 75 544A.

The possibility of mounting the weight plates on the barbell bar more quickly is known from DE 10 2011 013 859 A1, US 2011/0224053 A1 and US 2021/0016126 A1, all of which, however, require special barbell bars.

The object of the invention is therefore to make the replacement of the weight plates easier and faster.

Disclosure of Invention

Starting from a barbell of the type mentioned in the introduction, this object is achieved by the features of claim 1. Advantageous embodiments and developments of the invention are possible by means of the measures mentioned in the dependent claims.

The barbell according to the invention is therefore characterized in that the fastening nut is configured as a quick fastening nut with a through-hole with an internal thread, wherein the through-hole is widened at the end of the through-hole such that the quick fastening nut is movable along an insertion axis through the through-hole with the internal thread onto the barbell bar and/or along the barbell bar without engaging with the external thread, while the fastening nut is released and in a released position relative to the bar and has a thread axis extending through the through-hole, along which the external thread of the bar can engage with the internal thread, wherein the thread axis intersects the insertion axis such that: by tilting the clamping nut about the intersection of the insertion axis and the thread axis and about an axis perpendicular to the insertion axis and the thread axis, the internal thread and the external thread can be brought into engagement and thus into engagement and/or released from one another.

The weight plate and the barbell bar can advantageously remain unchanged. The fastening nut allows for simple mounting to the barbell bar and for quick clamping and unclamping of the weight plates. According to the invention, a barbell with a correspondingly optimized quick-action fastening nut is also provided for this purpose. The fastening nut can be pushed onto the thread of the barbell bar in a short time by means of the widened through-hole without having to rotate laboriously along the thread. This saves a lot of time, especially when the weight plates that should be fixed to the barbell are replaced often, as is the case during training. After the clamping nut has been turned over about the intersection of the insertion axis and the thread axis, the internal thread of the clamping nut engages into the external thread of the barbell bar, so that the clamping nut can clamp the weight plate arranged on the barbell bar. The tension built up in this way prevents it from flipping back from the engaged position to the disengaged position. The weight plate is thereby secured to the barbell bar, thereby further minimizing the risk of injury to the user.

Preferably, securing means are provided for securing said fastening nut in the engaged position and preventing unintentional turning and loosening of the fastening nut from said engaged position. Since the fastening nut does not become displaced and therefore does not loosen, the safety of the barbell user is increased. The weight piece likewise cannot loosen or even slip off.

The securing device can be designed such that it prevents the clamping nut from being turned back from the engagement position into the release position, or can also be designed such that the clamping nut secures the at least one weight plate in the engagement position against axial displacement. The fastening can also take place here when the fastening nut is not screwed down against the weight plate.

The fastening nut may preferably be obtained by 3D printing and/or injection moulding and/or die casting and/or other primary forming methods. This allows a cost-effective and simple production, wherein a light and stable fastening nut is obtained.

It is also conceivable that the through-hole may be obtained by drilling along the thread axis, intersecting the internal thread around the thread axis and making a threadless through-hole along the insertion axis. However, other manufacturing types are also conceivable.

The nominal diameter of the internal thread preferably corresponds to the nominal diameter of the external thread and/or the diameter of the threadless through-hole corresponds to the nominal diameter of the internal thread and/or the external thread. This ensures that, on the one hand, the fastening nut can be pushed precisely onto the barbell bar in the release position and, on the other hand, can be screwed into the external thread with the internal thread in the engagement position without tilting. With this embodiment, the clamping nut can also be loosened later on.

In one advantageous embodiment, the internal thread has two partial thread portions which are arranged opposite one another offset with respect to the thread axis, wherein each partial thread portion has at least one interrupted thread lead, each interrupted thread lead having an arc length of less than 360 °. In one aspect, the two sub-threaded portions may be arranged such that one sub-threaded portion is arranged at one end of the through-hole and the other sub-threaded portion is arranged at the other end of the through-hole. On the other hand, the two sub-thread portions may be arranged such that they are arranged with their respective arc length centers 180 ° offset around the thread axis.

It is envisaged that the intersection of the insertion axis and the thread axis is located between the two sub-thread portions. In order to turn the clamping nut from the release position into the engagement position, the rotation point of the clamping nut is also within the clamping nut.

Ideally, the clamping nut has a bearing surface comprising a first bearing region and a second bearing region, wherein the first bearing region is configured perpendicular to the thread axis and the second bearing region is configured as a chamfer and/or a radius relative to the first bearing region, such that the second bearing region is in contact with the weight plate when the clamping nut is pushed onto the rod and the first bearing region can be brought from the release position into the engagement position into contact with the weight plate when the clamping nut is tilted, in particular when the clamping nut is pivoted relative to the weight plate and/or further tightened. The fastening nut can thus be simply pushed onto the barbell bar in the release position up to the weight plate or at least just before the weight plate, without the fastening nut having to be laboriously rotated onto the thread. The fastening nut can then be brought into the engaged position by turning over and clamped against the weight plate to thereby prevent the weight plate from loosening during use of the barbell. The flat surface can be flat against the weight plate and the pressure generated by clamping the nut against the weight plate can be transmitted uniformly over the entire surface to the fastening nut. So that the load of the fastening nut is small even under high pressure, and thus the fastening nut can be used for a long period of time. Since the second bearing region is designed as a chamfer or as a radius relative to the first bearing region, the fastening nut can be positioned closer to the weight plate in the release position than if the bearing surface consists only of the first bearing region perpendicular to the thread axis.

The bevelling preferably forms a flat face perpendicular to the axis of insertion. In such an embodiment, the second bearing region can be used as a simple visual aid, the clamping nut having to be held in the orientation of the visual aid relative to the barbell bar, so that the clamping nut can be moved onto the external thread in the release position, since the second bearing region is formed perpendicular to the insertion axis. Such a configuration also assists the user in turning over the fastening nut, since the direction of turning over required for changing position can be detected by the two bearing regions.

It is conceivable that the outer side of the body of the fastening nut has at least one action rod extending in a plane perpendicular to the thread axis for manually tightening and/or loosening the fastening nut. The action bars may be arranged, for example, in the form of a wing or, in the case of a plurality of action bars, in the form of a star around the fastening nut.

Preferably, the outer side of the body of the clamping nut has at least one actuating rod extending in a plane spanned by the thread axis and the insertion axis for manually turning the clamping nut from the engaged position into the disengaged position or vice versa.

In a preferred development of the invention, the clamping nut can be pulled obliquely with respect to the longitudinal axis of the shaft or with the insertion axis parallel to the longitudinal axis of the shaft all the way onto the external thread region without any screwing movement, then turned over so that the external thread and the internal thread engage and then screwed and clamped with respect to the weight plate, since after turning over even the second bearing region normally does not bear under stress against the weight plate. A particularly stable fastening is thereby achieved.

Advantageously, the outer lateral surface of the body of the fastening nut has at least one C-shaped groove for manually tightening and/or loosening the fastening nut.

Preferably, the fastening device comprises a shaped element for receiving at least a part of the outer lateral surface of the fastening nut in a form-fitting manner, and/or a fastening cam and/or a fastening wedge and/or a C-clip for insertion into the through-hole along and/or parallel to the thread axis and/or the insertion axis, in order to prevent the fastening nut from being turned over from the engaged position into the disengaged position and/or from being released from the position of contact with the weight plate. By means of this form-fitting accommodation, the fastening nut is prevented from being accidentally loosened. Since the fastening nut is not loosened, the turning over of the fastening nut can be excluded.

Preferably, the fastening device has a tab and/or a hook and/or a spring, which holds the fastening nut in a clamping manner relative to the rod and/or prevents a tilting of the fastening nut, which leads to a release from the engagement position, wherein in particular the tab and/or the hook and/or the spring can be moved relative to one another elastically and/or plastically relative to the fastening nut and the rod, and/or wherein the tab and/or the hook and/or the spring are integrated in the fastening nut. In addition to the physical fixing, by judicious choice of the form of the fixing means, the overturning or loosening of the fastening nut can also be counteracted by the action of additional forces acting on the fastening nut. Thereby increasing the safety of the player when using the barbell in training and competition.

Advantageously, the at least one partial thread section has at least one thread lead with an arc length of at least 180 ° in order to be able to engage the external thread of the shank into the internal thread in the engaged position by a retaining action of the undercut. It is also contemplated that two or more adjacent or spaced apart thread leads comprise regions of 180 arc length about the thread axis. So that a sufficiently large holding action of the threads engaging each other can be ensured and the barbell bar is prevented from moving relative to the fastening nut.

Preferably, the fastening nut is at least partially, in particular completely, made of a form-stable plastic, in particular a polyamide-based plastic. On the one hand, shape-stable plastics are cost-effective and easy to manufacture and process, and are nevertheless stable, robust and durable.

Drawings

An embodiment of the invention is shown in the drawings and explained in more detail below on the basis of the drawings.

Specifically, the method comprises the following steps:

figure 1 shows a cross-sectional view of a fastening nut according to the invention,

figure 2 shows a plan view of a fastening nut according to the invention,

figure 3 shows the fastening nut in a released position on a portion of the barbell in a side view of a portion of the barbell,

fig. 4 shows the arrangement of fig. 3, with the fastening nut in the engaged position,

fig. 5 shows the arrangement of fig. 3, wherein the fastening nut is clamped on the barbell bar relative to the weight plate,

figure 6 shows a plan view of a second embodiment according to the invention,

figure 7 shows a cross-sectional view of a second embodiment according to the invention,

FIG. 8 shows a plan view of a third embodiment according to the present invention, an

Fig. 9 shows a cross-sectional view of a third embodiment according to the invention.

Detailed Description

Fig. 1 shows a cross-sectional view of a possible embodiment of a fastening nut 5 according to the invention. The through-hole 6 passing through the fastening nut 5 has two internally threaded

portions

7a,7b at ends of the through-hole 6 opposite to each other. The

thread portions

7a,7b here have the same thread characteristics and a common thread axis 9. The

thread portions

7a,7b are here situated with their arc length centers offset from one another by 180 ° about the thread axis 9, so that the

thread portions

7a,7b are not only opposite one another in the direction of the thread axis 9, but also in a direction perpendicular to the thread axis 9.

The through-hole 6 is widened at the end, so that the barbell bar 2 can be guided through the opening 6 along the insertion axis 8, while the external thread 4 of the barbell bar 2, which is configured complementary to the

internal thread

7a,7b of the fastening nut 5, does not engage into the

internal thread

7a,7b of the fastening nut 5.

The clamping nut 5 also has a first and a

second bearing region

10, 11. The second bearing region 11 is designed here as a chamfer of the first bearing region 10.

Fig. 2 shows the union nut 6 from fig. 1 in a plan view in the direction of the thread axis 9. The figure shows the action lever 12 configured in a C-shape. By this shape, the action lever 12 can be used when manually tightening and manually loosening the fastening nut 5.

Fig. 3-5 show how the fastening nut 5 is mounted on the barbell 1. In fig. 3, the fastening nut 5 is brought onto the barbell bar 2 in the release position and is free to move onto the external thread 4 of the bar 2. This can be done until the second bearing area 11 of the tightening nut 5 comes into contact with the weight plate 3 or until it is in the vicinity thereof.

In fig. 4, the fastening nut 5 is shown turned over at the engagement position near the weight plate 3. The

internal thread portions

7a,7b of the fastening nut 5 and the external thread 4 of the barbell bar 2 are engaged with each other. In this position, the fastening nut 5 can be clamped with respect to the weight plate 3 by rotation along the external thread 4.

Fig. 5 shows the clamping of the fastening nut 5 in the engaged position relative to the weight plate 3. The fastening nut 5 is prevented from being turned back into the release position again by itself by the contact of the first bearing region 10 of the fastening nut 5 with the weight plate 3. The fastening nut 5 can thus be loosened from the weight plate 3 by rotating it at most once along the external thread 4.

Fig. 6 and 7 show a further embodiment of the union nut 5. The outermost thread lead of the internally threaded part 7b has an arc length of more than 180 deg. compared to the clamping nut 5 in fig. 1. The external thread 4 of the barbell bar 2 thereby engages into the

internal threads

7a,7b of the fastening nut 5 by the undercut retaining action and thereby fixes the engagement position.

In the illustrated embodiment, the thread leads of the

female screw portions

7a and 7b are small, but are not set to this. However, a reduced number of thread leads is still sufficient to produce sufficient retention of the undercut at the engagement location of the fastening nut 5.

It is therefore also possible to increase the number of thread leads of the two

internal thread portions

7a,7 b. It is also conceivable that the two

thread sections

7a,7b are constructed with a different number of thread leads from one another.

Fig. 8 and 9 show a further embodiment of the fastening nut 5 with additional fixing projections 13. The fixing projection 13 is another variation for fixing the engagement position. When the clamping nut 5 is turned from the release position into the engagement position, the external thread 4 of the barbell bar 2 engages behind the fixing cam 13.

List of reference numerals:

1 Barbell

2 Barbell rod

3 weight tablet

4 external screw thread

5 fastening nut

6 through hole

7a internal threaded portion

7b internal thread part

8 insertion axis

9 thread axis

10 first support area

11 second bearing region

12 action rod

13 fixed lug

Claims

1. Barbell (1) as a sports apparatus for training and/or for playing games, having

A rod (2) for detachably and/or replaceably holding a weight plate (3),

wherein the rod (2) has at least one external thread (4),

at least one weight plate (3) having an opening for pushing onto the rod (2) and pulling off from the rod (2),

and at least one fastening nut (5) for holding and/or fixing a respective weight plate (3) to be held on the rod (2) by clamping the fastening nut (5) introduced into the external thread (4) relative to the weight plate (3),

it is characterized in that the preparation method is characterized in that,

the fastening nut (5) is designed as a quick-fastening nut having a through-hole (6) with an internal thread (7 a,7 b),

wherein the through-hole (6) is widened at the end of the through-hole (6) so that the quick-fastening nut (5)

i. Is movable with the internal thread (7 a,7 b) along an insertion axis (8) through the through-hole (6) onto the barbell bar (2) and/or along the barbell bar (2) without engaging with the external thread (4), while the fastening nut (5) is released relative to the bar (2) and is in a released position, and

having a thread axis (9) extending through the through hole (6) along which the external thread (4) of the rod (2) is engageable with the internal thread (7 a,7 b), wherein the thread axis (9) intersects the insertion axis (8) such that: by turning the fastening nut (5) around the intersection of an insertion axis (8) and a thread axis (9) and around an axis perpendicular to the insertion axis (8) and the thread axis (9), the internal thread (7 a,7 b) and the external thread (4) can be engaged and thus brought into an engaged position and/or released from each other.

2. Barbell (1) according to claim 1, characterized in that fixing means are provided for fixing the fastening nut (5) in the engaged position and preventing unintentional turning and loosening of the fastening nut (5) from the engaged position.

3. Barbell (1) according to any one of the preceding claims, wherein said fastening nut (5) is obtainable by 3D printing and/or injection moulding and/or die casting.

4. Barbell (1) according to any one of the preceding claims, wherein the through-hole (6) is obtainable by drilling along the thread axis (9), cutting an internal thread (7 a,7 b) around the thread axis (9) and making an unthreaded through-hole along the insertion axis (8).

5. Barbell (1) according to one of the preceding claims,

the nominal diameter of the internal thread (7 a,7 b) corresponds to the nominal diameter of the external thread (4), and/or

The diameter of the unthreaded through hole corresponds to the nominal diameter of the internal thread (7 a,7 b) and/or the external thread (4).

6. Barbell (1) according to any one of the preceding claims, characterized in that the internal thread (7 a,7 b) has two sub-thread portions (7 a,7 b) which are arranged opposite one another staggered with respect to the thread axis (9), wherein the sub-thread portions (7 a,7 b) each have at least one interrupted thread lead, each interrupted thread lead having an arc length of less than 360 °.

7. Barbell (1) according to any one of the preceding claims, wherein the intersection of the insertion axis (8) and the thread axis (9) is located between two sub-thread portions (7 a,7 b).

8. Barbell (1) according to any one of the preceding claims, characterized in that the fastening nut (5) has a bearing surface comprising a first and a second bearing region (10, 11), wherein the first bearing region (10) is configured perpendicular to the thread axis (9) and the second bearing region (11) is configured as a chamfer and/or a radius with respect to the first bearing region (10) such that: the second bearing region (11) is in contact with the weight plate (3) when the fastening nut (5) is pushed onto the rod (2) and the first bearing region (10) can be brought from the release position into the engagement position into contact with the weight plate (3) when the fastening nut (5) is turned over, in particular when the fastening nut (5) is pivoted relative to the weight plate (3) and/or further tightened, wherein in particular the chamfer is configured as a flat face perpendicular to the insertion axis (8).

9. Barbell (1) according to any one of the preceding claims, wherein the outer lateral surface of the body of the fastening nut (5) has at least one action bar (12) extending in a plane perpendicular to the thread axis (9) for manually tightening and/or loosening the fastening nut (5).

10. Barbell (1) according to any one of the preceding claims, wherein the outer lateral surface of the body of the fastening nut (5) has at least one action bar extending in a plane spanned by a thread axis (9) and an insertion axis (8) for manually turning the fastening nut (5) from the engaged position to the disengaged position or vice versa.

11. Barbell (1) according to any one of the preceding claims, wherein the outer lateral surface of the body of the fastening nut (5) has at least one C-shaped groove for manually tightening and/or loosening and/or overturning the fastening nut (5).

12. Barbell (1) according to any one of claims 2 to 11, characterized in that the fixing means comprise a shaped element for receiving at least a part of the outer lateral surface of the fastening nut (5) in a form-fitting manner and/or a fixing lug (13) and/or a fixing wedge and/or a C-clip for insertion into the through hole (6) along and/or parallel to the thread axis (9) and/or insertion axis (8) in order to prevent the fastening nut (5) from turning over itself from the engaged position to the released position and/or to prevent the fastening nut (5) from loosening from the position abutting against the weight plate (3).

13. Barbell (1) according to any one of claims 2-11, characterized in that the fixing means have tabs and/or hooks and/or springs that:

holding the fastening nut (5) in a clamping manner relative to the rod (2), and/or

-preventing the turning of the fastening nut (5), said turning resulting in a loosening from the engaged position,

wherein in particular the webs and/or hooks and/or springs are elastically and/or plastically movable relative to each other relative to the fastening nut (5) and the rod (2), and/or

Wherein the tab and/or catch and/or spring is integrated in the fastening nut (5).

14. Barbell (1) according to one of claims 6 to 13, characterized in that at least one sub-thread section (7 a,7 b) has at least one thread lead with an arc length of at least 180 ° in order to be able to bite the external thread (4) of the rod (2) into the internal thread (7 a,7 b) with an undercut retention action in the engaged position.

15. Barbell (1) according to any one of the preceding claims, characterized in that the fastening nut (5) is at least partially, in particular completely, made of a shape-stable plastic, in particular a polyamide-based plastic.